Popular choices include tea,
coffee, COCOA.
The Big Bang Theory Season 2, Episode 13
By that standard,
Penny is cuckoo for Cocoa Puffs.
The Big Bang Theory Season 4, Episode 9
Outside? I just made COCOA.
The Big Bang Theory Season 2, Episode 14
...with a cup
of Swiss Miss instant COCOA.
The Big Bang Theory Season 3, Episode 15
Here's your COCOA.
The Big Bang Theory Season 5, Episode 11